Hi, if you want to take screenshots when playing a video with Realplayer do this ;

1. Open RealPlayer and click the Tools menu, then Preferences.2. In the Category panel, click Hardware.3. In the Video Card Compatibility section, move the slider all the way to the left to Most reliable, which disables optimized video and overlays.4. Click OK.5. Restart RealPlayer.6. Open a video file and press the Print screen button.